SKX007 Replacement & Conversion Cases for Seiko Mod Builds
A replacement case keeps the SKX007 shape. A conversion case moves your build into another style, from the Samurai and Tuna to the 62mas, 6105 and Marine Master, while still taking SKX007 parts. Most cases here are 316L stainless steel, with titanium and CuSn8 bronze cases alongside them.
Case Styles
- SKX007 shape: replacement cases with a crown guard and a 3.8 o'clock crown, 44.8mm across the crown guard with 22mm lugs, plus versions with a 3 o'clock crown and with no crown guard.
- Titanium: titanium cases in the SKX007 shape or as a Samurai, each with its bezel pre-installed and a titanium crown and NH case cover included. They weigh 35g to 42g.
- Bronze: CuSn8 bronze cases in the SKX007 shape or as a Samurai, with the bezel pre-installed and a crown and sterile NH case cover included. The case will oxidize quickly.
- Samurai: steel Samurai conversion cases, designed for a Samurai bracelet.
- Marine Master: MM-inspired cases with 20mm lugs and a 3 o'clock or 3.8 o'clock crown. The OEM MM300 bracelet fits them; a Strapcode bracelet doesn't.
- 62mas: 20mm lugs, as a 40.5mm case with a 3 o'clock crown or a 40.8mm case at 3.8 o'clock.
- 6105: 42.7mm cases with a 3.8 o'clock crown and 20mm lugs, and a 42mm 6105-8000 case sold with a slim case back and a bracelet.
- Sub: 42mm cases with 22mm lugs, and the Slim Sub with 20mm lugs.
- Tuna: 47.7mm at the base tapering to 44mm, with a 4 o'clock crown and 200m water resistance. The crown is included and the bezel isn't, because the case takes the SKX007 rotating bezel.
- Turtle: 45mm cases with 22mm lugs, including a 3 o'clock version, made to pair with an SRP Turtle bracelet.
- 3 o'clock with crown guard: conversion cases with a 3 o'clock crown behind a crown guard, at 45mm or 47mm with 22mm lugs, or 45.7mm with 20mm lugs.
- PAM style: 41mm cases with 22mm lugs.
- Square: 22mm lugs, with or without a crown guard, including a set with a sterile bezel, flat sapphire crystal and matte black chapter ring pre-installed.
- Nautilus style: 20mm lugs, made for the NH movement and a 28.5mm dial, most with a flat sapphire crystal included.
- Field and Seamaster style: 41.8mm cases with 20mm lugs. The field cases take a 20mm flat end link bracelet, and the Seamaster-style cases, at 3 o'clock or 3.8 o'clock, take an SKX013 crown.
- SNZF: an SNZF17-style case with non-drilled lugs. It takes an SKX013 crown and fits the SNZF bracelet.
- W&S Diver's: 43mm cases with 15mm lugs, sold with an oyster bracelet and a flat sapphire crystal. They take an SKX007 chapter ring and crown.
Before You Order
Three things change from one case to the next, and most cases state them. Lug width is 22mm on most SKX007-shape cases, 20mm on many conversion styles and 15mm on the W&S Diver's. The bracelet is the part that most often doesn't carry over from an SKX007, and several cases name the one that does, from the OEM MM300 to the SRP Turtle and SNZF bracelets. The case cover is an option on most cases and sold separately on a few, in the case cover collection.
Other Watches & Finishing Your Build
For other watches, see the SKX013 and SRPE cases, the 36mm, 38mm and 40mm cases, or every case in the store. To finish an SKX007 build, add a rotating bezel, crown, chapter ring, crystal, dial and movement for your Seiko mod.
Frequently Asked Questions
Which SKX007 parts fit these cases?
Nearly every case here takes SKX007 parts, and the usual exception is the bracelet. The Seamaster-style cases and the SNZF case take an SKX013 crown instead, though not the SKX013 slim crown, and the 47mm crown-guard cases come with their own crown. Each case names the parts it takes, so check yours before you order.
Which movement do they take?
The case covers offered with these cases are for the NH movement, and some cases also offer a 7s case cover. For an NH34 build, the silver Sub and the Slim Sub fit the NH34 with a double dome sapphire crystal, and the W&S Diver's cases offer a double dome crystal for the NH34.
Do I need a 3 o'clock or a 3.8 o'clock dial?
Each case has a 3 o'clock or 3.8 o'clock crown, or a 4 o'clock crown on the Tuna. Most Watch&Style dials have four legs and fit either a 3 o'clock or a 3.8 o'clock crown: you remove the legs you don't need.
Browse the SKX007 cases above to find the one for your build.